BITHYNIA. Prusa ad Olympum. Trebonianus Gallus, 251-253. Diassarion (Bronze, 24 mm, 7.49 g, 12 h). Γ ΟΥΕΙΒΙΟC ΤΡΕΒΩΝΙΑΝΟC ΓΑΛΛΟC Α Radiate, draped and cuirassed bust of Trebonianus Gallus to right. Rev. ΠΡΟΥC-Α-ΕΩΝ Serapis wearing polos, standing front, his head turned to left, holding two corn ears with his raised right hand, and holding long scepter with his left. Apparently unpublished not recorded in RPC, but shares the same obverse die as RPC IX 216-217. Very fine.